Why do I get an error when I put a call for the output of a function (defined within a function) *after* the...












0















My code does what I want it to do, but I want to understand why it does what it does. I find that in MATLAB if I call for the output of a function after the definition of the function, I get an error, but not if I call it before the function's definition. My impression is that MATLAB is putting the cart before the horse, and I'd like to know why I am mistaken in that impression.



function [out,outt]=f_testFunctionWithinFunction(arg_in)
% function has to be invoked BEFORE its definition.
out=f_inside(arg_in);

function use=f_inside(argg_in),
use=sin(argg_in);
return

outt=f_inside(arg_in);

return


The expression out=f_testFunctionWithinFunction(5) yields -0.9589=sin(5). However, [out,outt]=f_testFunctionWithinFunction(5) yields an error message, due to asking for "outt". Why?










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  • If you want to know how to define functions you can read about function. Also local functions should be distinguished from nested functions.

    – rahnema1
    Jan 2 at 7:38
















0















My code does what I want it to do, but I want to understand why it does what it does. I find that in MATLAB if I call for the output of a function after the definition of the function, I get an error, but not if I call it before the function's definition. My impression is that MATLAB is putting the cart before the horse, and I'd like to know why I am mistaken in that impression.



function [out,outt]=f_testFunctionWithinFunction(arg_in)
% function has to be invoked BEFORE its definition.
out=f_inside(arg_in);

function use=f_inside(argg_in),
use=sin(argg_in);
return

outt=f_inside(arg_in);

return


The expression out=f_testFunctionWithinFunction(5) yields -0.9589=sin(5). However, [out,outt]=f_testFunctionWithinFunction(5) yields an error message, due to asking for "outt". Why?










share|improve this question

























  • If you want to know how to define functions you can read about function. Also local functions should be distinguished from nested functions.

    – rahnema1
    Jan 2 at 7:38














0












0








0








My code does what I want it to do, but I want to understand why it does what it does. I find that in MATLAB if I call for the output of a function after the definition of the function, I get an error, but not if I call it before the function's definition. My impression is that MATLAB is putting the cart before the horse, and I'd like to know why I am mistaken in that impression.



function [out,outt]=f_testFunctionWithinFunction(arg_in)
% function has to be invoked BEFORE its definition.
out=f_inside(arg_in);

function use=f_inside(argg_in),
use=sin(argg_in);
return

outt=f_inside(arg_in);

return


The expression out=f_testFunctionWithinFunction(5) yields -0.9589=sin(5). However, [out,outt]=f_testFunctionWithinFunction(5) yields an error message, due to asking for "outt". Why?










share|improve this question
















My code does what I want it to do, but I want to understand why it does what it does. I find that in MATLAB if I call for the output of a function after the definition of the function, I get an error, but not if I call it before the function's definition. My impression is that MATLAB is putting the cart before the horse, and I'd like to know why I am mistaken in that impression.



function [out,outt]=f_testFunctionWithinFunction(arg_in)
% function has to be invoked BEFORE its definition.
out=f_inside(arg_in);

function use=f_inside(argg_in),
use=sin(argg_in);
return

outt=f_inside(arg_in);

return


The expression out=f_testFunctionWithinFunction(5) yields -0.9589=sin(5). However, [out,outt]=f_testFunctionWithinFunction(5) yields an error message, due to asking for "outt". Why?







matlab function nested






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edited Jan 2 at 6:35









rahnema1

10.6k2923




10.6k2923










asked Jan 2 at 3:57









ignoramusignoramus

6




6













  • If you want to know how to define functions you can read about function. Also local functions should be distinguished from nested functions.

    – rahnema1
    Jan 2 at 7:38



















  • If you want to know how to define functions you can read about function. Also local functions should be distinguished from nested functions.

    – rahnema1
    Jan 2 at 7:38

















If you want to know how to define functions you can read about function. Also local functions should be distinguished from nested functions.

– rahnema1
Jan 2 at 7:38





If you want to know how to define functions you can read about function. Also local functions should be distinguished from nested functions.

– rahnema1
Jan 2 at 7:38












1 Answer
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you should end functions with end, instead of return. try:



function [out,outt]=f_testFunctionWithinFunction(arg_in)
% function has to be invoked BEFORE its definition.
disp('test')
out=f_inside(arg_in);

function use=f_inside(argg_in),
use=sin(argg_in);
end

outt=f_inside(arg_in);

end





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    1 Answer
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    you should end functions with end, instead of return. try:



    function [out,outt]=f_testFunctionWithinFunction(arg_in)
    % function has to be invoked BEFORE its definition.
    disp('test')
    out=f_inside(arg_in);

    function use=f_inside(argg_in),
    use=sin(argg_in);
    end

    outt=f_inside(arg_in);

    end





    share|improve this answer




























      1














      you should end functions with end, instead of return. try:



      function [out,outt]=f_testFunctionWithinFunction(arg_in)
      % function has to be invoked BEFORE its definition.
      disp('test')
      out=f_inside(arg_in);

      function use=f_inside(argg_in),
      use=sin(argg_in);
      end

      outt=f_inside(arg_in);

      end





      share|improve this answer


























        1












        1








        1







        you should end functions with end, instead of return. try:



        function [out,outt]=f_testFunctionWithinFunction(arg_in)
        % function has to be invoked BEFORE its definition.
        disp('test')
        out=f_inside(arg_in);

        function use=f_inside(argg_in),
        use=sin(argg_in);
        end

        outt=f_inside(arg_in);

        end





        share|improve this answer













        you should end functions with end, instead of return. try:



        function [out,outt]=f_testFunctionWithinFunction(arg_in)
        % function has to be invoked BEFORE its definition.
        disp('test')
        out=f_inside(arg_in);

        function use=f_inside(argg_in),
        use=sin(argg_in);
        end

        outt=f_inside(arg_in);

        end






        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Jan 2 at 7:29









        Yuval HarpazYuval Harpaz

        735512




        735512
































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